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Insulin-like growth factor-1 upregulates the expression of stem cell factor in rat colonic smooth muscle cells
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- Author:
- No author available
- Journal Title:
- WORLD CHINESE JOURNAL OF DIGESTOLOGY
- Issue:
- 34
- DOI:
- 10.3969/j.issn.1009-3079.2009.34.006
- Key Word:
- 胰岛素样生长因子1;平滑肌细胞;干细胞因子;受体;抗体
Abstract： 目的:探讨胰岛素样生长因子1(IGF-1) 对大鼠结肠平滑肌细胞(SMC)表达干细胞因子(SCF) 的影响. 方法:酶解法分离培养SD 大鼠结肠S M C、α-actin 免疫荧光鉴定,然后将大鼠结肠SMC 随机分为IGF-1 不同浓度(0 、5、10 、50 、100 、150 μg/L) 、时间(0 、8、16 、24 、48 h) 及IGF-1α受体(IGF-1Rα)抗体(0 、50 、100 、150 μg/L) 干预组;Western blot 、RT-PCR 法检测SMC合成SCF 的变化. 结果:低剂量IGF-1(5 、10 μg/L) 对SCF 蛋白和mR N A表达无影响(P >0.05),中高剂量IGF-1(50 、100 、150 μg/L) 诱导其表达增加(均P <0.05),100 μg/L可能为体外最大有效浓度(0.820±0.061 vs 0.167±0.015;1.269± 0.219 vs 0.560±0.023,均P <0.05),且其促SCF 蛋白和mRNA合成的最高峰在第16 小时(0.420 ±0.034 vs 0.209±0.001;1.407±0.133 vs 0.477±0.041,均P <0.05),IGF-1Rα抗体可抑制SCF 蛋白和mRNA合成,抑制作用呈浓度依赖性(P <0.05). 结论:IGF-1 能通过作用于SMC上的IGF-1 受体刺激大鼠结肠SMC内SCF 的表达.
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